File:The primitive streak and notochordal canal in Chelonia (Plate XI) BHL4780770.jpg

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PLATE XI.
All Figures magnified 73 diameters, except Figure 58, which is magnified 420 diameters.
Fig. 54. An oblique section through the notochordal opening of the embryo seen in surface view in Fig. 9, Plate II., cut along the line 54. This section passes through a lobe of the opening on the left, and cuts through the edge of a lobe on the right side.
Fig. 55. The third section behind the dorsal notochordal opening. The so called plug region is grooved.
Note. — By a mistake the primitive groove is marked as neurenteric canal. can. n’ent, It should have been sul. pr. as in Figure 96.
Fig. 56. Sixth section behind the dorsal notochordal opening. The groove still persists.
Fig. 57. A section near the anterior margin of the shield. A blind canal (can. st'cd.) exists within the entoderm of this region.
Note. — The letters sul. pr. should have been omitted.

Fig. 58. Represents under a high magnification the so called plug region seen in Figure 55.
Date
Source https://www.biodiversitylibrary.org/pageimage/4780770 The primitive streak and notochordal canal in Chelonia / by Gertrude Crotty Davenport. Prepared under the direction of Edward Laurens Mark.
Author Davenport, Gertrude Anna Crotty
Page ID
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4780770
Item ID
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26729 (Find related Wikimedia Commons images)
Title ID
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5777 (Find related Wikimedia Commons images)
Page numbers
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Plate XI
BHL Page URL
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https://www.biodiversitylibrary.org/page/4780770
DOI
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10.5962/bhl.title.5777
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Illustration
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Date/TimeThumbnailDimensionsUserComment
current09:25, 9 April 2024Thumbnail for version as of 09:25, 9 April 20242,118 × 3,526 (1.13 MB)Rasbak (talk | contribs)
15:05, 19 November 2015Thumbnail for version as of 15:05, 19 November 20152,118 × 3,526 (476 KB)Fæ (talk | contribs)== {{int:filedesc}} == {{BHL | source = http://www.biodiversitylibrary.org/pageimage/4780770 | description = The primitive streak and notochordal canal in Chelonia / by Gertrude Crotty Davenport. Prepared under the direction of Edward Laurens Mark. |...

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